Besides my opinion that there are no Diamondbacks worthy of being classified as vintage as opposed to just plain old, there's nothing exotic or special about your bike, so any general tutorials or basic bicycle repair books will cover what you need to know to get this working right.
As a rule, tutorials aren't usually comprehensive, so you have to divide the job into categories, such as align wheel, service hub bearing, service BB, etc. and work your way through the bike part by part.
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